static void Main(string[] args)
{
string path = @"C:\Users\Greg\Pictures\file000325161223.jpg";
//string path = @"E:\Development\vs2017\RotationGdiTest\Debug\D500\DSC_0001.JPG";
if (args.Length > 0)
{
path = args[0];
}
using (FileStream fileStream = new FileStream(path, FileMode.Open))
{
byte[] buf2 = new byte[2];
fileStream.Read(buf2, 0, 2);
if (buf2[0] != 0xFF && buf2[1] != 0xD8)
{
Console.WriteLine("File not a JPEG");
goto done;
}
fileStream.Read(buf2, 0, 2);
while (!Jpeg.Definitions.SOS(buf2) && !Jpeg.Definitions.SOI(buf2))
{
byte[] lenbuf = new byte[2];
fileStream.Read(lenbuf, 0, 2);
Array.Reverse(lenbuf);
ushort segmentLength = BitConverter.ToUInt16(lenbuf, 0);
int len = (int)segmentLength - 2;
Console.WriteLine($"Reading {len} {BitConverter.ToString(lenbuf)} {BitConverter.ToString(buf2)} ");
if (len <= 0)
{
goto done;
}
byte[] buf = new byte[len];
fileStream.Read(buf, 0, len);
try
{
if (Jpeg.Definitions.APP0(buf2))
{
IMarker app0 = App0.Parse(buf);
if (app0.GetMarkerType() == MarkerType.JFIF)
{
App0.Jfif jfif = (App0.Jfif)app0;
Console.WriteLine($"Jfif {jfif.GetVersion()}");
switch (jfif.DensityUnit)
{
case App0.Jfif.XYDensityUnit.AspectRatio:
Console.WriteLine("XYDensityUnit AspectRatio");
break;
case App0.Jfif.XYDensityUnit.DotsPerInch:
Console.WriteLine("XYDensityUnit DotsPerInch");
break;
case App0.Jfif.XYDensityUnit.DotsPerCm:
Console.WriteLine("XYDensityUnit DOtsPerCm");
break;
}
Console.WriteLine($"XDensity {jfif.XDensity}, YDensity {jfif.YDensity}");
Console.WriteLine($"Thumbnail X {jfif.XThumbnailCount}, Thumbnail Y {jfif.YThumbnailCount}");
}
else if (app0.GetMarkerType() == MarkerType.JFXX)
{
App0.Jfxx jfxx = (App0.Jfxx)app0;
Console.WriteLine("Jfxx");
}
else
{
Console.WriteLine("APP0");
}
}
else if (Jpeg.Definitions.APP1(buf2))
{
IMarker app = App1.Parse(buf);
if (app.GetMarkerType() == MarkerType.EXIF)
{
App1.Exif exif = (App1.Exif)app;
Console.WriteLine($"Exif {exif.TiffId} {exif.FirstIFDOffset} {exif.Length}");
Ifd ifd0 = exif.Ifd0;
Console.WriteLine($"IFD0 tag count {ifd0.FieldInteroperabiltyCount}");
Console.WriteLine($"Next IFD {ifd0.OffsetToNextIfd}");
for (int i = 0; i < ifd0.FieldInteroperabilties.Length; ++i)
{
Console.WriteLine($"{ifd0.FieldInteroperabilties[i].TypeValue.TypeToString()} {ifd0.FieldInteroperabilties[i].Tag}");
Console.WriteLine(ifd0.FieldInteroperabilties[i]);
if (ifd0.FieldInteroperabilties[i].ExifIfd)
{
Ifd exifIfd = ifd0.FieldInteroperabilties[i].Exif;
for (int j = 0; j < exifIfd.FieldInteroperabilties.Length; ++j)
{
Console.WriteLine($"{exifIfd.FieldInteroperabilties[j].TypeValue.TypeToString()} {exifIfd.FieldInteroperabilties[j].Tag}");
Console.WriteLine(exifIfd.FieldInteroperabilties[j]);
}
}
if (ifd0.FieldInteroperabilties[i].InteroperabilityIfd)
{
Ifd interoperabilityIfd = ifd0.FieldInteroperabilties[i].Interoperability;
for (int j = 0; j < interoperabilityIfd.FieldInteroperabilties.Length; ++j)
{
Console.WriteLine($"{interoperabilityIfd.FieldInteroperabilties[j].TypeValue.TypeToString()} {interoperabilityIfd.FieldInteroperabilties[j].Tag}");
Console.WriteLine(interoperabilityIfd.FieldInteroperabilties[j]);
}
}
}
}
else
{
App1.XMP xmp = (App1.XMP)app;
Console.WriteLine("XMP");
Console.WriteLine(xmp.RawXml);
}
}
else if (Jpeg.Definitions.APPn(buf2))
{
Appn appn = new Appn(buf, buf2[1] & 0x0F);
Console.WriteLine($"Appn {appn.N}");
}
else if (Jpeg.Definitions.DQT(buf2))
{
Console.WriteLine($"DQT");
}
else if (Jpeg.Definitions.SOFn(buf2))
{
SOFn sofn = new SOFn(buf, buf2[1] & 0x0F);
Console.WriteLine($"SOFn {sofn.N}");
}
else if (Jpeg.Definitions.DRI(buf2))
{
Console.WriteLine("DRI");
}
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
fileStream.Read(buf2, 0, 2);
}
}
done:
if (Debugger.IsAttached)
{
Console.WriteLine("Complete. Press any key to continue.");
Console.ReadKey();
}
}
